Vibrator



Jan'. 3, 1961 M. A. l. FONTAINE VIBRATOR Filed Feb. 2, 1959 www ik? l l,C

United States Patent VIBRATOR Michel Alphonse Irne Fontaine, 9 Rue desPetits- Hotels, Paris, France Filed Feb. 2, 1959, Ser. No. 790,633

Claims priority, application France Nov. 7, 1958 8 Claims. (Cl. 259-1)The present invention relates to an improved vibrator using the staticpressure of a fluid under pressure.

The present invention is particularly concerned with the typeconstituted by a hollow cylinder, an inner cylinder having a smallerdiameter arranged in said hollow cylinder, one of the cylinders beingiixed and the other movable, said movable cylinder being adapted to rollfreely in relation to the fixed cylinder without any mechanicalconnection with any outer member, each cylinder being provided at itsends with guiding side faces perpendicular to its axis, the guidingfaces of the movable cylinder sliding at the contact of the guidingfaces of the fixed cylinder, and a movable paddle dividing the roomincluded between both cylinders into two chambers in communication onewith an inlet port for the fluid under pressure and the other with anoutlet port, said paddle being adapted for receding into 'a recessprovided longitudinally in one of both cylinders.

Such a type of a vibrator is known in the art and is disclosed, forinstance, in applicants prior U.S. Patent No. 2,763,472, dated September18, 1956.

In the vibrators of this type, the movable cylinder and the spaceincluded between both cylinders and divided into two chambers by themovable paddle or blade are extending along the same length. The samediameter of the outer cylinder and the same diameter of the innercylinder throughout their lengths brings about a constant ratio betweenthe total volume of the chambers and the weight of the rotated movablecylinder.

The consumption of fluid under pressure being proportional to the totalvolume of the chambers, it has been found that said consumption isexcessive in relation to the weight of the rotated mass.

It is, therefore, one object of the present invention to provide avibrator of this type consuming less of fluid under pressure with thesame weight of the rotated mass.

It is another object of the present invention to provide a vibratorwherein the movable cylinder is extended laterally by a mass extendingbeyond the space included between both cylinders and divided into twochambers by the movable paddle.

Preferably, the movable cylinder is extended, on both sides of the spaceincluded between both cylinders and divided into two chambers by themovable paddle or blade, by two fairly symmetrical masses having alarger diameter than the' inner diameter of the outer cylinder.

At least one of the guiding side faces of the movable cylinder may beconstituted by a face of the mass prolonging said movable cylinder.

Said face of the mass may be adjoined to the end of the movable cylinderor adjoining to a face of a fiange integral with the fixed cylinder.

It is also another object of the present invention to provide a vibratorwherein at least one of the masses prolonging the movable cylinder maybe bored with one or more ducts for the passing through of the drivinguid.

It is yet another object of the present invention to ICC provide avibrator wherein said movable cylinder and at least one of the massesprolonging it may be bored with an axial duct for the passing through ofthe driving iiuid.

It is still another object of the present invention to provide avibrator wherein said axial duct may open opposite an axial duct goingthrough a flange integral with the fixed cylinder, the mass extendingthe movable cylinder being in tight sliding contact with said ange.

With these and other objects in view, which will become apparent in thefollowing detailed description, the present invention will be clearlyunderstood in connection with the accompanying drawings, in which:

Figure 1 is a longitudinal sectional view of the vibrator; and

Fig. 2 is a cross-sectional view taken along the lines II-II of Fig. l,at an enlarged scale.

Referring now to the drawing, the vibrator comprises a housingconsisting of three tubular members, 1, 1a and 1b.

The central member 1 having the smallest inner diameter constitutes afixed hollow cylinder of the driving member of the vibrator.

In the hollow cylinder is arranged an inner movable cylinder 2 of asmaller diameter laterally extended by two fairly symmetrical cheeks 3and 4 of a larger diameter than the inner diameter of the fixed hollowcylinder 1.

A movable paddle or blade 5, extending along the entire length of thecylinders 1 and 2 and adapted to recede into a longitudinal slot of theinner cylinder 2, divides the space defined between both cylinders andthe aforesaid side faces of cylindrical cheeks 3 and 4 into two chambers6 and 7.

'Ihe other side face of the cylindrical cheek 3 is in tight slidingcontact, under interposition of a sealing ring 8, with a iiange 9integral with or connected to the tubular member 1b and consequentlywith the fixed hollow cylinder 1.

The movable inner cylinder 2 and the cylindrical cheek 3 extending itare bored with an axial duct 10 which opens opposite an axial duct 11going through the flange 9 through which enters the fluid under pressureconveyed by the pipe 12 fitted on a mouth piece 13 integral with theflange 9.

The diameter of the duct 11 -is larger than the diameter of the duct 10and the difference between the diameters is at least equal to thedifference between the inner diameter of the fixed hollow cylinder 1 andthe diameter of the movable inner cylinder 2, so that the opening of theduct 10 is constantly entirely in communication with the opening of theduct 11 when the movable inner cylinder 2 is rolling within the fixedhollow cylinder 1, which ensures a constant section for the admission ofuid under pressure into the driving member of the vibrator.

The duct 10 is in communication with the chamber 6 through the bores 14drilled in the movable inner cylinder 2 on one side of the paddle orblade 5.

On the other side of the paddle or blade 5, the chamber 7 is incommunication with the inside of the tubular member 1a and 1b throughthe bores 15 opening, on the one hand, on the periphery of thecylindrical cheeks 3 and 4 and, on the other hand. into recesses 16provided in the side faces of the cylindrical cheeks 3 and 4 adjoiningto the inner cylinder 2 and which are alternatively obturated andcleared by the side faces of the fixed hollow cylinder 1, when the innercylinder 2 is rolling within the hollow cylinder l.

The tubular members 1a and 1b are in communication with each other bymeans of a range of holes 17 going through laterally the wall of thefixed cylinder 1.

In a similar manner, the flange 9 is drilled through longitudinally witha range of bores 18 putting the tubular members 1a and 1b intocommunication with the inside of a tube 19 coaxial to the aforesaid tube12 and fitted into the free end of the tubular member 1b.

The operation of the vibrator is similar to that of the vibratordescribed in applicants prior U.S. Patent No. 2,763,472, dated September18, 1956, with the only difference that the outer hollow cylinder, whichis movable in said prior patent, is fixed in the present case, therelative motion of both cylinders remaining the same.

The admission of compressed air into chamber 6 is performed by a tube12, the duct 11 going through the flange 9, the duct going through thecylindrical cheek 3 and the movable inner cylinder 2, and the bores 14disposed on one side of the paddle or blade 5, whereas the exhaust Afromthe chamber 7 is performed by the recesses 16 and the bores 1S of thecylindrical cheeks 3 and 4, the bores 17 of the fixed cylinder 1, thebores 18 of the fiange 9 and the pipe 19.

It will be noted that, in comparison with the old vibrators of the sametype, the total volume of the charnbers of the driving part isconsiderably reduced in relation to the weight of the rotated mass,which brings about the considerable reduction in the consumption offiuid under pressure with the same useful power.

While a particular embodiment of this invention has been illustrated anddescribed herein, it is intended that this invention be not limited tosuch disclosure, and changes and modifications can be made andincorporated within the scope of the claims. i

. I claim:

1. A vibrator using the static pressure of a iiuid under pressure, ofthe type constituted by a hollow cylinder, an inner cylinder having asmaller diameter arranged within said hollow cylinder, one of thecylinders being fixed and the other movable, the movable cylinder beingadapted to roll freely in relation to the fixed cylinder without anymechanical connection with any outer member, each cylinder beingprovided at its ends with guiding side faces perpendicular to its axis,the guiding faces of the movable cylinder sliding at the contact of theguiding faces of the fixed cylinder, and a movable paddle dividing theroom included between both cylinders into -two chambers one incommunication with a port for the admission of fluid under pressure andthe other with an exhaust port, said paddle being adapted to recede intoa recess provided longitudinally in one of the cylinders, theimprovement residing in that the movable cylinder is prolonged axiallyby a mass extending beyond the room included between both cylinders anddivided into two chambers by the movable paddle.

2. The vibrator, as set forth in claim l, wherein the movable cylinderhas cheek extensions of a larger outer diameter than the inner diameterof said fixed cylinder.

3. The vibrator, as set forth in claim 2, wherein at least one of theguiding side faces of one of said cylinders is formed by a face of saidcheek extensions of said movable cylinder.

4. The vibrator, as set forth in claim 3, wherein said face of saidcheek extensions adjoins the end of said fixed cylinder.

5. The vibrator, as set forth in claim 2, wherein one face of said cheekextensions adjoins a face of a ange integral with said fixed cylinder.

6. The vibrator, as set forth in claim 2, wherein at least one of saidcheek extensions of said inner cylinder has at least one duct for thepassing through of said driving fluid in communication with the fluidadmission port.

7. The vibrator, as set forth in claim 2, wherein said movable cylinderand at least one of said cheek extensions have an axial duct for thepassing through of said driving tiuid in communication with the fluidadmission port.

8. The vibrator, as set forth in claim 7, which includes a flangeintegral with said outer hollow cylinder,` said axial duct openingopposite another axial duct going through said ange, and one face of oneof said cheek extensions being in tight sliding contact with saidiiange.

References Cited in the tile of this patent UNITED STATES PATENTS2,763,472 Fontaine Sept. 18, 1956

